转自http://hualikejava.iteye.com/blog/1461383
1.常驻型广播
常驻型广播,当你的应用程序关闭了,如果有广播信息来,你写的广播接收器同样的能接受到,
他的注册方式就是在你的应用程序中的AndroidManifast.xml进行注册。通常说这种方式是静态注册
下面是配置例子
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<receiver android:name=".widget.DeskWidgeWeather">
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<meta-data android:name="android.appwidget.provider" android:resource="@xml/widget_weather_provider" />
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<intent-filter>
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<action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
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<action android:name="action_weather"/>
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intent-filter>
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lt;/receiver>
2.非常驻型广播
当应用程序结束了,广播自然就没有了,比如你在activity中的onCreate或者onResume中注册广播接收器
在onDestory中卸载广播接收器。这样你的广播接收器就一个非常驻型的了。这种也叫动态注册。
比如写一个监听SDcard状态的广播接收器
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SdcardStateChanageReceiver sdcardStateReceiver;
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@Override
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protected void onCreate(Bundle savedInstanceState)
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{
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super.onCreate(savedInstanceState);
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IntentFilter filter = new IntentFilter();
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filter.addAction(Intent.ACTION_MEDIA_REMOVED);
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filter.addAction(Intent.ACTION_MEDIA_EJECT);
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filter.addAction(Intent.ACTION_MEDIA_MOUNTED);
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filter.addDataScheme("file");
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sdcardStateReceiver = new SdcardStateChanageReceiver();
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registerReceiver(sdcardStateReceiver,filter);
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}
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@Override
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protected void onDestroy(){
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unregisterReceiver(sdcardStateReceiver);
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}
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class SdcardStateChanageReceiver extends BroadcastReceiver{
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@Override
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public void onReceive(Context context, Intent intent)
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{
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String state=android.os.Environment.getExternalStorageState();
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System.out.println("SDCard 发生改变! 状态:"+state);
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}
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public void checkSDCard(){
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String state=android.os.Environment.getExternalStorageState();
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System.out.println(state);
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if(state.equals(android.os.Environment.MEDIA_REMOVED ) || state .equals(android.os.Environment.MEDIA_UNMOUNTED)){
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System.out.println("SDCard 已卸载!");
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}
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}
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}
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